#pragma once
#define POLARSSL_HAVE_ASM
/**
 * \file aesni.h
 *
 * \brief AES-NI for hardware AES acceleration on some Intel processors
 *
 *  Copyright (C) 2013, Brainspark B.V.
 *
 *  This file is part of PolarSSL (http://www.polarssl.org)
 *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
 *
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "aes.h"

#define POLARSSL_AESNI_AES 0x02000000u
#define POLARSSL_AESNI_CLMUL 0x00000002u

#ifdef __cplusplus
extern "C"
{
#endif

	/**
	 * \brief          AES-NI features detection routine
	 *
	 * \param what     The feature to detect
	 *                 (POLARSSL_AESNI_AES or POLARSSL_AESNI_CLMUL)
	 *
	 * \return         1 if CPU has support for the feature, 0 otherwise
	 */
	int aesni_supports(unsigned int what);

	/**
	 * \brief          AES-NI AES-ECB block en(de)cryption
	 *
	 * \param ctx      AES context
	 * \param mode     AES_ENCRYPT or AES_DECRYPT
	 * \param input    16-byte input block
	 * \param output   16-byte output block
	 *
	 * \return         0 on success (cannot fail)
	 */
	int aesni_crypt_ecb(aes_context* ctx,
		int mode,
		const unsigned char input[16],
		unsigned char output[16]);

	/**
	 * \brief          GCM multiplication: c = a * b in GF(2^128)
	 *
	 * \param c        Result
	 * \param a        First operand
	 * \param b        Second operand
	 *
	 * \note           Both operands and result are bit strings interpreted as
	 *                 elements of GF(2^128) as per the GCM spec.
	 */
	void aesni_gcm_mult(unsigned char c[16],
		const unsigned char a[16],
		const unsigned char b[16]);

	/**
	 * \brief           Compute decryption round keys from encryption round keys
	 *
	 * \param invkey    Round keys for the equivalent inverse cipher
	 * \param fwdkey    Original round keys (for encryption)
	 * \param nr        Number of rounds (that is, number of round keys minus one)
	 */
	void aesni_inverse_key(unsigned char* invkey,
		const unsigned char* fwdkey, int nr);

	/**
	 * \brief           Perform key expansion (for encryption)
	 *
	 * \param rk        Destination buffer where the round keys are written
	 * \param key       Encryption key
	 * \param bits      Key size in bits (must be 128, 192 or 256)
	 *
	 * \return          0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH
	 */
	int aesni_setkey_enc(unsigned char* rk,
		const unsigned char* key,
		size_t bits);

#ifdef __cplusplus
}
#endif
